Distance measuring system, particularly for spacing of moving ve

Details Distance measuring system, particularly for spacing of moving ve Distance measuring system, particularly for spacing of moving ve

1975-01-13

1977-12-13

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

180 98, 340 34, 343 65SS, B60K 2604, B60T 712, G01S 939, G08G 116

Patent

active

040632377

ABSTRACT:
Radiation is directed between moving vehicles, and the time between transmission and reception of waves, such as microwaves, is determined similarly to radar timing, to determine the spacing between the vehicles. To prevent spurious responses and ambiguities, the signal reflected from the leading vehicle to the trailing vehicle is modulated; modulation can be controlled either automatically, by providing a modulation control signal associated with a given lane of roadway or under driver-command.

REFERENCES:
patent: 2702342 (1955-02-01), Korman
patent: 2996137 (1961-08-01), Chu et al.
patent: 3018368 (1962-01-01), Mountjoy
patent: 3235025 (1966-02-01), Quinn
patent: 3408646 (1968-10-01), Simon et al.
patent: 3798641 (1974-03-01), Preti

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